This Audio Processor takes the high road. In an era when call centers are cutting costs and personnel, the IP15 costs more but does much more. It is a fact known by all call center managers that call completion rate means money saved or lost. VistaPlus IP15's AudioIQ's DSP (digital signal processor)-powered multiband compression and noise and echo reduction technologies shorten the call by creating the most intelligable sound possible. The Audio Processor is compatible with all Plantronics 'H' tops and VXI 'P' tops.